Method of construction brushes



' Sept. v23. 1924. 1 5mm W. UNGER I METHOD 0F CONSTRUCTING BRUSHESWILLIAM UNGER, 0F VJOOSTER, OHIO.

METHOD OF CONSTRUCTING BRUSHES.

Application filed November 6, 1922. Serial No. 599,426.

brushes, and particularly to improvements in method of constructingpaint, varnish, and calcimine brushes, and the like, in which the brushmaterialis secured in the brush head by cement or other adhesivematerial. The principal object of my invention is to provide bettermeans for assembling, securing and solidifying brush material in thebrush block or head, and to simplify and cheapen the manufacture of suchbrushes without diminishing their strength, pliability and durability.

It consists of improved means for assembling and inserting brushmaterial within the brush block or head, and, particularly for immersingand thoroly saturating the butt ends of such material within the cavityof the brush head, and for solidifying and tightening such butt endstherein after insertion into a measured quantity of liquid cement in thecavity, as hereinafter set forth and stated in the appended claim.

I attain the objects stated and provide the means aforesaid, as follows-My invention is illustrated by the accompanying drawings, in whichsimilar letters and figures of reference indicate like parts.

Referring thereto, Fig. l is an edge view of a flat brush, cut away forbetter illustration of the interior construction. Fig. 2 is a detailview of a temporary or pilot band for enclosing and holding the brushmate rial, and of a spacer block in position ready for introduction ofbrush material thereto. Fig. 3 is a detail view of the spacer block,detached; and Fig. at is a cross section of F ig. 2 on the dotted line2--.;, showing brush mate-rial in loose position, ready for transferenceto the cavity of the brush head. Fig. 5 is a detail sectional view of abrush head cavity, showing partial introduction of brush materialtherein, spacer block pushed up within the pilot band, and the latter inposition to facilitate such introduction into the cavity partly filledwith liquid cement. Fig. 6 is a similar view, showing a modification ofthe brush head having two cavities. Fig. 7 is a perspective view showingthe mass of brush material assembled within the pilot band, and thehollow formed by pushing up the spacer plate within the band, and thebutt ends of the brush material loosely spread apart by suchdisplacement of the spacer plate, ready for introduction into the cavityof the brush head shown in Fig. 8. In the drawings, A is a temporaryband, called pilot band, of suitable sheet metal about an inch wide,shaped so as to exactly register with the inner margin of the brush headcavity E, on the ferrule D; its object being to temporarily receive andhold suflicient brush material loosely assembled therein around thespacer plate C lo cated centrally therein, as shown at C, Fig. 4. l l

D is the rim or ferrule of the brush head forming the cavity with thebottom E within which a measured quantity of liquid cement is stored tosaturate and hold the butt ends of the brush material, as shown inFig. 1. The several arrows indicate the direction of movement of theparts to which they respectively refer.

Having thus prepared the several parts mentioned, they are assembled andthe brush is constructed as follows-- A measured quantity of brushmaterial, such as bristles or other suitable material is insertedendwise loosely within the pilot band A, which for convenience may bestood upon a platform or table, around the spacer plate C and the entiremass evened at the butt ends thereof by tapping, as shown in Fig. 4. Theassembling of the brush material being thus completed, the spacer plateis manually pushed up a short distance within the brush material so asto provide a hollow space, C centrally therein, as shown in Fig. 7. Bysuch displacement of the spacer plate, the butt ends of the brushmaterial, by their natural elasticity, are loosened and spread apartwithin the pilot band below the spacer plate, and thus adapted to bethoroly saturated by the liquid cement when immersed therein ashereafterstated. When thus prepared, the brush material is manually pressed intothe brush head cavity by the guidance of the pilot band, as shown inFigs. 5 and 6, said cavity containing a measured quantity of liquid orsemi-liquid.

cement, such as commonly used in the making of brushes, and said buttends immersed therein, and the hollow space C thereby filled in between.

When. thus pushed into the brush head cavity; with the buttendsthe'r'eof slightly spread apart andseparated from eachother, andsaid hollow space filled with the liquid cement, as aforesaid, wherebythorough saturation of the mass of butt ends is accomplished, the pilotband A is drawn upwards to give access to the upperedgeof the spacerplate by a pointed tool, and thereby the spacerplate isfor'ceddownto thebottom of the brush'head cavity, as shown in F ig. 1. Such movement andpressure forces the liquid cem'ent intothe adjacent mass of brushmaterial and solidifies and tightens the same in the brush liead cavityconrpletelyythus completing the construction of the brush, ready fordrying and liarde'ningof the element the usual well known way, and thepilot bandmay be removed If desired, a. plurality of spacer plates maybeemployed-inlike manner, and a brush handle may be supplied either beforeor after the complet'ion'of the brush as aforesaid. i 1

1 am aware "it is not new to guide bristles into a socket by means of atapered sleeve, orthe like, or to assemble brush material a'roundas'pa'c'er' block to hold the same while applying liquid cement theretofor afterwaidsinse'rtion, or to first fill the socket witli cenient,then introduce the butt end of bristles"ai1dallow easement to set,and'such I do not broadly'claim'f My invention is distinquished by thenovel useof a movable spacer plate in co-operation witlitlie pilot bandwhereby the butt ends of the brush materialare' inserted by immersionin-the liquid cement within the brush head cavity, and, whencoinple'tely satu-,

rated thereby, are solidified in the brush head .by the forcedinterposition of the spacer plate within said.

I do not limit my claim to mere matter of form, but claim suchmodifications as are fairly within the scope of my invention.

Having thus fully descr bed my invention,

the brush head cavity, as afore- The herein described method of assembling a brush consisting in providing a bristle receiving socket with ameasured quantity of liquid cement, assembling a group of bristles abouta spacer plate or core with the bristle butts even, and within a pilotband shaped to register with the pe riphery of the said socket, thenmoving the spacer plate a short distance" within the group ofbristles'so as to form a hollow space in the butt end and toloosen themto admit cement therebetween, inserting the; bristles down through thepilot band

